Extended electronic door lock backing plate



FIG. 1 is a rear perspective view of an extended electronic door lock backing plate design.

FIG. 2 is a front view of the extended electronic door lock backing plate design.

FIG. 3 is a side view of the extended electronic door lock backing plate design; and,

FIG. 4 is a top view of the extended electronic door lock backing plate design.

The portions of the article in FIG. 1 shown in broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an extended electronic door lock backing plate, as shown and described. 